/*
 * This file contains code from "C++ Primer, Fourth Edition", by Stanley B.
 * Lippman, Jose Lajoie, and Barbara E. Moo, and is covered under the
 * copyright and warranty notices given in that book:
 *
 * "Copyright (c) 2005 by Objectwrite, Inc., Jose Lajoie, and Barbara E. Moo."
 *
 *
 * "The authors and publisher have taken care in the preparation of this book,
 * but make no expressed or implied warranty of any kind and assume no
 * responsibility for errors or omissions. No liability is assumed for
 * incidental or consequential damages in connection with or arising out of the
 * use of the information or programs contained herein."
 *
 * Permission is granted for this code to be used for educational purposes in
 * association with the book, given proper citation if and when posted or
 * reproduced.Any commercial use of this code requires the explicit written
 * permission of the publisher, Addison-Wesley Professional, a division of
 * Pearson Education, Inc. Send your request for permission, stating clearly
 * what code you would like to use, and in what specific way, to the following
 * address:
 *
 *  Pearson Education, Inc.
 *  Rights and Contracts Department
 *  75 Arlington Street, Suite 300
 *  Boston, MA 02216
 *  Fax: (617) 848-7047
*/

#include <string>
#include <iostream>

class Endangered
{
public:
	virtual ~Endangered();
	virtual std::ostream& print(std::ostream&) const;
	virtual void highlight() const;
	// ...
};

class ZooAnimal;
extern std::ostream&
operator<<(std::ostream&, const ZooAnimal&);

class ZooAnimal
{
public:
	ZooAnimal();
	ZooAnimal(std::string animal, bool exhibit,
			  std::string family): nm(animal),
		exhibit_stat(exhibit),
		fam_name(family) { }
	virtual ~ZooAnimal();

	virtual std::ostream& print(std::ostream&) const;
	virtual int population() const;

	// accessors
	std::string name() const
	{
		return nm;
	}
	std::string family_name() const
	{
		return fam_name;
	}
	bool onExhibit() const
	{
		return exhibit_stat;
	}
	// ...
protected:
	std::string nm;
	bool        exhibit_stat;
	std::string fam_name;
	// ...
private:
};

class Bear : public ZooAnimal
{
	enum DanceType { two_left_feet, macarena, fandango, waltz };
public:
	Bear();
	Bear(std::string name, bool onExhibit = true,
		 std::string family = "Bear"):
		ZooAnimal(name, onExhibit, family),
		ival(0), dancetype(two_left_feet) { }

	virtual std::ostream& print(std::ostream&) const;
	virtual int toes() const;
	int mumble(int);
	void dance(DanceType) const;

	virtual ~Bear();
private:
	int         ival;
	DanceType   dancetype;
};

class Panda : public Bear, public Endangered
{
public:
	Panda();
	Panda(std::string name, bool onExhibit = true);
	virtual ~Panda();
	virtual std::ostream& print(std::ostream&) const;
	void highlight();
	virtual int toes();
	virtual void cuddle();
// ...
};

Panda::Panda(std::string name, bool onExhibit)
	: Bear(name, onExhibit, "Panda") { }

inline
std::ostream& Panda::print(std::ostream& os) const
{
	Bear::print(os);          // print the Bear part
	Endangered::print(os);    // print the Endangered part
	return os;
}

class PolarBear : public Bear
{
	/* . . . */
};
